Page |1
MACS 609 CERTIFICATION TEST 2026/2027 BANK / EXAM
QUESTIONS AND VERIFIED ANSWERS |ALREADY GRADED
A+|
What was a key design change for HFC-134a A/C systems versus
CFC-12 A/C systems? - ANSWER-Increased condenser capacity
and airflow
What transports ultraviolet dye through the A/C system? -
ANSWER-Refrigerant oil
Which of the following statements is NOT true about newer
mobile A/C systems? - ANSWER-It's good practice to 'Top Off'
new A/C systems
What part of the Clean Air Act gives the EPA authority to establish
standards regarding servicing of mobile A/C? - ANSWER-Section
609
Is it acceptable and legal to vent HFC-134a? - ANSWER-No
, Page |2
Which of the following are concerns regarding purity of HFC-
134a? - ANSWER-All of the answers are true
Why must recycled refrigerant be checked for air? - ANSWER-To
avoid performance loss, system damage
HFC-134a has a Global Warming Potential (GWP) of - ANSWER-
1430
Correct storage procedures for tanks of HFO-1234yf include -
ANSWER-All of the answers are true
The sale of HFC-134a in containers less than two pounds is
restricted to - ANSWER-There is no sales restriction on HFC-
134a in containers less than two pounds
Which type of mobile A/C system will usually require additional
time/precautions to extract all the refrigerant? - ANSWER-
Accumulator type
MACS 609 CERTIFICATION TEST 2026/2027 BANK / EXAM
QUESTIONS AND VERIFIED ANSWERS |ALREADY GRADED
A+|
What was a key design change for HFC-134a A/C systems versus
CFC-12 A/C systems? - ANSWER-Increased condenser capacity
and airflow
What transports ultraviolet dye through the A/C system? -
ANSWER-Refrigerant oil
Which of the following statements is NOT true about newer
mobile A/C systems? - ANSWER-It's good practice to 'Top Off'
new A/C systems
What part of the Clean Air Act gives the EPA authority to establish
standards regarding servicing of mobile A/C? - ANSWER-Section
609
Is it acceptable and legal to vent HFC-134a? - ANSWER-No
, Page |2
Which of the following are concerns regarding purity of HFC-
134a? - ANSWER-All of the answers are true
Why must recycled refrigerant be checked for air? - ANSWER-To
avoid performance loss, system damage
HFC-134a has a Global Warming Potential (GWP) of - ANSWER-
1430
Correct storage procedures for tanks of HFO-1234yf include -
ANSWER-All of the answers are true
The sale of HFC-134a in containers less than two pounds is
restricted to - ANSWER-There is no sales restriction on HFC-
134a in containers less than two pounds
Which type of mobile A/C system will usually require additional
time/precautions to extract all the refrigerant? - ANSWER-
Accumulator type
